Bearing for vertical shafts.



No. 755,703. 'PATENTED MAR. 29, 1904.

- v B. M. SANGER.

BEARING FOR VERTICAL SHAFTS.

APPLIOATION FILED JUNE 20, 1903.

0 MODEL.

I! k 6,; WJ A g m UNITED STATES Patented March 2'9, 1904.

PATENT OFF-ICE.

BEARING FOR VERTICAL SHAFTS.

SPECIFICATION forming part of Letters Patent No. 755,703, dated March 29, 1904.

Serial No. 162,312. (No model.)

T all whom it y 007L067": The lower end of the shaft 3 is supported in Be it known that I, EUGENE M. SANGER, a a bearing member of self-lubricating insulat- I citizen of the United States, residing at Bosing material, and in this form of the invention ton, county of Suffolk, State of Massachusetts, said bearing member comprises a sleeve 6, of 5 have invented an Improvement in Bearings this material, having a cylindrical bore of a 55 for Vertical Shafts, of which the following size just to fit the lower end of the shaft 3, description, in connection with the accompaand a base piece or plate 7, of the same matenying drawings, isa specification, like numerrial, onwhich the sleeve 6 rests and which als on the drawings representing like parts. takes the weight of the shaft 3. To reduce I0 This invention relates to bearings for verfriction, I preferably support the end of said 60 tical shafts, and has for its object to provide shaft 3 directly on a ball 8, which in turn rests a self-lubricating insulated bearing of this upon the concave face of a metallic washer or class which is simple in construction. disk 9, the latter disk being supported di- The bearingcomprisesalower bearing memrectly upon the plate or disk 7 and being con- I 5 ber of self-lubricating insulating material in fined within the sleeve 6. The plate 7 and 5 which the lower end of the vertical shaft the sleeve 6 when brought together form a rests and an upper bearing in the form of a socket, into which the end of the shaft rests centering-sleeve of similar material through and by which the shaft is entirely surrounded. which the upper end of the shaft projects and These two parts form, in effect, a cup-shaped by which the shaft is centered. To reduce bearing, which not only supports the lower 7 friction,I preferably employ a ball in the lower end of the shaft but also thoroughy insulates bearingmember,onwhich theshaftrests. This said end of the shaft. The upper end of the form of lower bearing member receives the shaft 3 is centered by a suitable sleeve 10, lower end of the shaft and besides supporting through which the shaft passes, said sleeve it also insulates it, and as the centering-sleeve being of some suitable self-lubricating insu- 75 is also of insulating material it will be observed lating material. that the entire surface is insulated. This I have found from experiments that Wood makes the bearing especially useful for armaimpregnated with oil forms a very satisfacture-shafts of electric motors in which the tory material for the bearing, as it has selfshaft is arranged vertically, because it relubricating properties and is also an insulator. 8o quires practically no attention, so far as lubri- This saturation or impregnation of the wood cation is concerned, and it also thoroughly inwith oil may be accomplished in any suitable sulates the armature-shaft. way, as by boiling the Wood in oil.

The invention may be embodied in a great Where the invention is applied to a fan of 3 5 number of different constructions, and for the the character herein illustrated, the disk or 5 purposes of illustration I have shown my inplate 7 will be suitably supported upon the vention as embodied in an electric fan having base portion 11 of the motor-casing 12, and a vertical motor-shaft. some suitable meanssuch, for instance, as

Figure 1 of the drawings is a vertical secthe housingl3will be employed to maintain 40 tion through an electric fan having avertical the sleeve 6 in its proper position. The up- 9 motor-shaft and showing my improved bearper centering-sleeve 10 is supported in the upings for the shaft, and Fig. 2 is an enlarged per head 16 of the motor-casing. view of the lower or step bearing. 17 designates any suitable fan situated out- 3'designates the vertical shaft, which is supside of the motor-casing and fast to the shaft ported in my improved bearings, and, as 3, said fan being of course entirely out of conherein illustrated, said shaft is an armaturetact with the motor-casing. shaft of an electric motor and has mounted The only stationary parts of the device with thereon the usual armature '4: and commutator which the motor-shaft has contact are the 5. In the interests of clearness I have omitsleeves 10 and 6 and antifriction-ball 8, and as the ball 8 is insulated from the motor-casing I 5 ted the field-magnets from the drawings.

it follows that the armature-shaft will be completely insulated.

The self-lubricating properties of the bearings make a bearing which requires no attention, so far as lubrication is concerned, and one which is therefore especially adapted for electric fans which are running a large part of the time and which usually get little or no attention.

Instead of using a housing 13 for the sleeve 6 which is separate from the sleeve I may make said sleeve thicker through and provide it with suitable means for securing it to the stationary support. In this case no separate housing is necessary.

While I have shown herein one way in which my invention may be applied, I do not wish to be restricted to what is illustrated in the drawings, as obviously this form of bearing may be used in any other construction.

Having described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A vertical shaft, a bearing member of self-lubricating insulating material and having a socket into which the lower end of the shaft sets, said bearing member insulating said end of the shaft and a centering-sleeve of similar material through which the shaft extends and by which it is centered and at its upper end insulated.

2. A vertical shaft, a bearing member of self-lubricating insulating material having a socket into which the lower end of said shaft sets, a ball in said socket on which the end of the shaft rests, and a centering-sleeve of similar material through which the shaft extends and by which its upper end is centered, said bearing member and centering-sleeve operating to insulate the shaft.

3. A self-lubricating insulated bearing for vertical motor-shafts, comprising a plate of self-lubricating insulating material, a sleeve of similar material supported by the plate and into which the lower end of the shaft extends, the weight of said shaft being supported by said plate, and a centering-sleeve also of the same material through which the shaft extends and by which its upper end is centered, said sleeves and plate serving to insulate the shaft.

4:. In a self-lubricating insulated bearing for vertical shafts, a plate of self-lubricating insulating material, a sleeve of similar mate-.

EUGENE M. SANGER.

Witnesses:

LOUIS C. SMITH, JOHN G. EDWARDS. 

